The answer is 0784 the second one
        
             
        
        
        
The following aqueous solutions represents good buffer systems:
- 0.22 M acetic acid + 0.15 M potassium acetate
- 0.29 M ammonium nitrate + 0.32 M ammonia 
<h3>What is a buffer?</h3>
A buffer is a solution used to stabilize the pH (acidity) of a liquid. 
A good buffer system is generally known to contain close or equal concentrations of a weak acid and its conjugate base.
Based on the above explanation, the following represents a good buffer system as they are between their weak acid and conjugate base:
- 0.22 M acetic acid + 0.15 M potassium acetate
- 0.29 M ammonium nitrate + 0.32 M ammonia
Learn more about buffer at: brainly.com/question/22821585
#SPJ1
 
        
             
        
        
        
Answer:
Gains
Explanation:
If it gains an electron it causes the atom to become negative since electrons are negative and an overall charge of an atom is neutral. Therefore, it would become negative.
Hope this helps :)